This topic covers air contaminants, including mold, fiberglass, carbon monoxide, radon, and many other substances that have a Permissible Exposure Limit (PEL).

Employers whose workers are exposed to air contaminants must comply with PELs, ceiling limits, and 8-hour time-weighted averages for the relevant substance. Regulated air contaminants are listed in three tables in 29 CFR 1910 Subpart Z.

For related resources and training materials, refer to the following topics: